The state Department of Environmental Quality has approved two former sludge holding ponds at Marathon Petroleum Co.'s Garyville refinery as fit for reuse and no longer a risk to human health and the ...

More than a dozen Illinois power plants store toxic coal ash in sludge ponds similar to the one that burst and spread contaminated muck over 300 acres of eastern Tennessee last month, according to a ...

Amid the bogs and forests of northern Alberta, in the heart of the Canadian oilpatch, lie some of the largest waste dumps of the global energy business. These waste pools — known as tailings ponds — ...

The sludge in West Longview’s old sewage treatment ponds appears to meet state and federal standards for removal and use elsewhere as a soil amendment, which would allow the city to reclaim the ...

For months people in a Hollister neighborhood along South Street have been complaining about an 'unbearable' odor coming from sludge ponds located steps away from their homes. The smell is from tomato ...